This article examines how personhood was shaped in the routine dispositional relations of longhouse life among the Iroquoian societies of eastern North America. Drawing on scholarship that situates the emergence of culturally-specific modes of personhood within relational networks of people and things, I present evidence that over seven centuries, a deep resonance developed between the ‘polyvalence’ of Iroquoian domestic spaces and a broadly ‘fractal’ (sensu Fowler 2004) or ‘part-in-whole’ sense of personhood in Iroquoian societies. An ethnohistoric review of seventeenth-century Ontario Iroquoian concepts of personhood is followed by an archaeological analysis of the development of longhouses between the tenth and sixteenth centuries. I report the results of a kernel density estimation (KDE) analysis of the spatial distribution of post and pit features across longhouse living floors in a diachronic study of 45 hearth areas. The results indicate that everyday practices within the longhouse came to follow several characteristic patterns by the mid-twelfth century ad. These patterns served to define ‘polyvalent’ relationships in which resident persons and nuclear families were at once identifiable as distinct social atoms and as inextricable components of larger hypostatic wholes — most especially house and lineage. A fundamental coherence was thereby established between the embodied experience of domestic taskscapes and a mode of personhood in which any social whole was understood as a dynamic and partible alliance of elements.